1 /* 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ken Smith of The State University of New York at Buffalo. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#) Copyright (c) 1989, 1993, 1994 The Regents of the University of California. All rights reserved. 33 * @(#)mv.c 8.2 (Berkeley) 4/2/94 34 * $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/bin/mv/mv.c,v 1.24.2.6 2004/03/24 08:34:36 pjd Exp $ 35 * $DragonFly: src/bin/mv/mv.c,v 1.12 2006/11/11 12:05:36 victor Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/time.h> 40 #include <sys/wait.h> 41 #include <sys/stat.h> 42 #include <sys/mount.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <fcntl.h> 47 #include <limits.h> 48 #include <signal.h> 49 #include <stdio.h> 50 #include <stdlib.h> 51 #include <string.h> 52 #include <sysexits.h> 53 #include <unistd.h> 54 55 #include "pathnames.h" 56 57 #define mv_pct(x,y) (int)(100.0 * (double)(x) / (double)(y)) 58 59 static int fflg, iflg, nflg, vflg; 60 volatile sig_atomic_t info; 61 62 static int copy(const char *, const char *); 63 static int do_move(const char *, const char *); 64 static int fastcopy(const char *, const char *, struct stat *); 65 static void siginfo(int); 66 static void usage(void); 67 68 int 69 main(int argc, char **argv) 70 { 71 size_t baselen, len; 72 int rval; 73 char *p, *endp; 74 struct stat sb; 75 int ch; 76 char path[PATH_MAX]; 77 78 while ((ch = getopt(argc, argv, "finv")) != -1) 79 switch (ch) { 80 case 'i': 81 iflg = 1; 82 fflg = nflg = 0; 83 break; 84 case 'f': 85 fflg = 1; 86 iflg = nflg = 0; 87 break; 88 case 'n': 89 nflg = 1; 90 fflg = iflg = 0; 91 break; 92 case 'v': 93 vflg = 1; 94 break; 95 default: 96 usage(); 97 } 98 argc -= optind; 99 argv += optind; 100 101 signal(SIGINFO, siginfo); 102 103 if (argc < 2) 104 usage(); 105 106 /* 107 * If the stat on the target fails or the target isn't a directory, 108 * try the move. More than 2 arguments is an error in this case. 109 */ 110 if (stat(argv[argc - 1], &sb) || !S_ISDIR(sb.st_mode)) { 111 if (argc > 2) 112 usage(); 113 exit(do_move(argv[0], argv[1])); 114 } 115 116 /* It's a directory, move each file into it. */ 117 if (strlen(argv[argc - 1]) > sizeof(path) - 1) 118 errx(1, "%s: destination pathname too long", *argv); 119 strcpy(path, argv[argc - 1]); 120 baselen = strlen(path); 121 endp = &path[baselen]; 122 if (!baselen || *(endp - 1) != '/') { 123 *endp++ = '/'; 124 ++baselen; 125 } 126 for (rval = 0; --argc; ++argv) { 127 /* 128 * Find the last component of the source pathname. It 129 * may have trailing slashes. 130 */ 131 p = *argv + strlen(*argv); 132 while (p != *argv && p[-1] == '/') 133 --p; 134 while (p != *argv && p[-1] != '/') 135 --p; 136 137 if ((baselen + (len = strlen(p))) >= PATH_MAX) { 138 warnx("%s: destination pathname too long", *argv); 139 rval = 1; 140 } else { 141 memmove(endp, p, (size_t)len + 1); 142 if (do_move(*argv, path)) 143 rval = 1; 144 } 145 } 146 exit(rval); 147 } 148 149 static int 150 do_move(const char *from, const char *to) 151 { 152 struct stat sb; 153 int ask, ch, first; 154 char modep[15]; 155 156 /* 157 * Check access. If interactive and file exists, ask user if it 158 * should be replaced. Otherwise if file exists but isn't writable 159 * make sure the user wants to clobber it. 160 */ 161 if (!fflg && !access(to, F_OK)) { 162 163 /* prompt only if source exist */ 164 if (lstat(from, &sb) == -1) { 165 warn("%s", from); 166 return (1); 167 } 168 169 #define YESNO "(y/n [n]) " 170 ask = 0; 171 if (nflg) { 172 if (vflg) 173 printf("%s not overwritten\n", to); 174 return (0); 175 } else if (iflg) { 176 fprintf(stderr, "overwrite %s? %s", to, YESNO); 177 ask = 1; 178 } else if (access(to, W_OK) && !stat(to, &sb)) { 179 strmode(sb.st_mode, modep); 180 fprintf(stderr, "override %s%s%s/%s for %s? %s", 181 modep + 1, modep[9] == ' ' ? "" : " ", 182 user_from_uid((unsigned long)sb.st_uid, 0), 183 group_from_gid((unsigned long)sb.st_gid, 0), to, YESNO); 184 ask = 1; 185 } 186 if (ask) { 187 first = ch = getchar(); 188 while (ch != '\n' && ch != EOF) 189 ch = getchar(); 190 if (first != 'y' && first != 'Y') { 191 fprintf(stderr, "not overwritten\n"); 192 return (0); 193 } 194 } 195 } 196 if (!rename(from, to)) { 197 if (vflg) 198 printf("%s -> %s\n", from, to); 199 return (0); 200 } 201 202 if (errno == EXDEV) { 203 struct statfs sfs; 204 char path[PATH_MAX]; 205 206 /* 207 * If the source is a symbolic link and is on another 208 * filesystem, it can be recreated at the destination. 209 */ 210 if (lstat(from, &sb) == -1) { 211 warn("%s", from); 212 return (1); 213 } 214 if (!S_ISLNK(sb.st_mode)) { 215 /* Can't mv(1) a mount point. */ 216 if (realpath(from, path) == NULL) { 217 warnx("cannot resolve %s: %s", from, path); 218 return (1); 219 } 220 if (!statfs(path, &sfs) && 221 !strcmp(path, sfs.f_mntonname)) { 222 warnx("cannot rename a mount point"); 223 return (1); 224 } 225 } 226 } else { 227 warn("rename %s to %s", from, to); 228 return (1); 229 } 230 231 /* 232 * If rename fails because we're trying to cross devices, and 233 * it's a regular file, do the copy internally; otherwise, use 234 * cp and rm. 235 */ 236 if (lstat(from, &sb)) { 237 warn("%s", from); 238 return (1); 239 } 240 return (S_ISREG(sb.st_mode) ? 241 fastcopy(from, to, &sb) : copy(from, to)); 242 } 243 244 static int 245 fastcopy(const char *from, const char *to, struct stat *sbp) 246 { 247 struct timeval tval[2]; 248 static u_int blen; 249 static char *bp; 250 mode_t oldmode; 251 int nread, from_fd, to_fd; 252 ssize_t wtotal = 0, wcount; 253 254 if ((from_fd = open(from, O_RDONLY, 0)) < 0) { 255 warn("%s", from); 256 return (1); 257 } 258 if (blen < sbp->st_blksize) { 259 if (bp != NULL) 260 free(bp); 261 if ((bp = malloc((size_t)sbp->st_blksize)) == NULL) { 262 blen = 0; 263 warnx("malloc failed"); 264 return (1); 265 } 266 blen = sbp->st_blksize; 267 } 268 while ((to_fd = 269 open(to, O_CREAT | O_EXCL | O_TRUNC | O_WRONLY, 0)) < 0) { 270 if (errno == EEXIST && unlink(to) == 0) 271 continue; 272 warn("%s", to); 273 close(from_fd); 274 return (1); 275 } 276 while ((nread = read(from_fd, bp, (size_t)blen)) > 0) { 277 wcount = write(to_fd, bp, (size_t)nread); 278 wtotal += wcount; 279 280 if (wcount != nread) { 281 warn("%s", to); 282 goto err; 283 } 284 285 if (info) { 286 info = 0; 287 fprintf(stderr, "%s -> %s %3d%%\n", 288 from, to, 289 mv_pct(wtotal, sbp->st_size)); 290 } 291 } 292 if (nread < 0) { 293 warn("%s", from); 294 err: if (unlink(to)) 295 warn("%s: remove", to); 296 close(from_fd); 297 close(to_fd); 298 return (1); 299 } 300 close(from_fd); 301 302 oldmode = sbp->st_mode & ALLPERMS; 303 if (fchown(to_fd, sbp->st_uid, sbp->st_gid)) { 304 warn("%s: set owner/group (was: %lu/%lu)", to, 305 (u_long)sbp->st_uid, (u_long)sbp->st_gid); 306 if (oldmode & (S_ISUID | S_ISGID)) { 307 warnx( 308 "%s: owner/group changed; clearing suid/sgid (mode was 0%03o)", 309 to, oldmode); 310 sbp->st_mode &= ~(S_ISUID | S_ISGID); 311 } 312 } 313 if (fchmod(to_fd, sbp->st_mode)) 314 warn("%s: set mode (was: 0%03o)", to, oldmode); 315 /* 316 * XXX 317 * NFS doesn't support chflags; ignore errors unless there's reason 318 * to believe we're losing bits. (Note, this still won't be right 319 * if the server supports flags and we were trying to *remove* flags 320 * on a file that we copied, i.e., that we didn't create.) 321 */ 322 errno = 0; 323 if (fchflags(to_fd, (u_long)sbp->st_flags)) 324 if (errno != EOPNOTSUPP || sbp->st_flags != 0) 325 warn("%s: set flags (was: 0%07o)", to, sbp->st_flags); 326 327 tval[0].tv_sec = sbp->st_atime; 328 tval[1].tv_sec = sbp->st_mtime; 329 tval[0].tv_usec = tval[1].tv_usec = 0; 330 if (utimes(to, tval)) 331 warn("%s: set times", to); 332 333 if (close(to_fd)) { 334 warn("%s", to); 335 return (1); 336 } 337 338 if (unlink(from)) { 339 warn("%s: remove", from); 340 return (1); 341 } 342 if (vflg) 343 printf("%s -> %s\n", from, to); 344 return (0); 345 } 346 347 static int 348 copy(const char *from, const char *to) 349 { 350 int status; 351 pid_t pid; 352 353 if ((pid = fork()) == 0) { 354 execl(_PATH_CP, "mv", vflg ? "-PRpv" : "-PRp", "--", from, to, 355 (char *)NULL); 356 warn("%s", _PATH_CP); 357 _exit(1); 358 } 359 if (waitpid(pid, &status, 0) == -1) { 360 warn("%s: waitpid", _PATH_CP); 361 return (1); 362 } 363 if (!WIFEXITED(status)) { 364 warnx("%s: did not terminate normally", _PATH_CP); 365 return (1); 366 } 367 if (WEXITSTATUS(status)) { 368 warnx("%s: terminated with %d (non-zero) status", 369 _PATH_CP, WEXITSTATUS(status)); 370 return (1); 371 } 372 if (!(pid = vfork())) { 373 execl(_PATH_RM, "mv", "-rf", "--", from, (char *)NULL); 374 warn("%s", _PATH_RM); 375 _exit(1); 376 } 377 if (waitpid(pid, &status, 0) == -1) { 378 warn("%s: waitpid", _PATH_RM); 379 return (1); 380 } 381 if (!WIFEXITED(status)) { 382 warnx("%s: did not terminate normally", _PATH_RM); 383 return (1); 384 } 385 if (WEXITSTATUS(status)) { 386 warnx("%s: terminated with %d (non-zero) status", 387 _PATH_RM, WEXITSTATUS(status)); 388 return (1); 389 } 390 return (0); 391 } 392 393 static void 394 usage(void) 395 { 396 397 fprintf(stderr, "%s\n%s\n", 398 "usage: mv [-f | -i | -n] [-v] source target", 399 " mv [-f | -i | -n] [-v] source ... directory"); 400 exit(EX_USAGE); 401 } 402 403 static void 404 siginfo(int notused __unused) 405 { 406 info = 1; 407 } 408